Cheddar and Chive Rounds (Tea Sandwiches) Makes 16 finger sandwiches 6 oz finely grated extra-sharp Cheddar (1 1/2 cups) 1/2 cup mayonnaise 6 tablespoons finely chopped sweet onion 32 thin slices firm white sandwich bread 3/4 stick (6 tablespoons) unsalted butter, softened 2 bunches fresh chives, very thinly sliced (3/4 cup) 1. Stir together Cheddar, mayonnaise, onion, and salt and pepper to taste. 2. Cut out a round from each bread slice with cookie cutter. Arrange 8 bread rounds on a work surface and divide half of Cheddar mayonnaise among them, spreading evenly to edges. Top each with a plain round. Cover sandwiches with plastic wrap and make more in same manner. 3. Spread a thin layer of butter around cut edges of rounds and roll in chives, pressing with your fingertips. Sandwiches may be made 6 hours ahead and chilled, covered with dampened paper towels and plastic wrap.